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What makes genes burst.

Varun Sood1, Tom Misteli1

  • 1National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD 20896, USA.

Trends in Cell Biology
|September 3, 2025
PubMed
Summary
This summary is machine-generated.

Gene bursting describes random transcription pulses, common in all life. Its regulation involves transcription factors, chromatin, and enhancers, controlling gene expression diversity.

Keywords:
RNA polymeraseschromatinepigenetic modificationsgene burstingnon-histone post-translational modifications

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Area of Science:

  • Molecular Biology
  • Genetics
  • Epigenetics

Background:

  • Active genes exhibit transient, stochastic transcription pulses known as gene bursting.
  • This phenomenon is ubiquitous, evolutionarily conserved, and fundamental to biological processes.
  • Gene bursting kinetics vary significantly across different genes.

Purpose of the Study:

  • To elucidate the intricate regulatory mechanisms governing gene bursting.
  • To understand the roles of transcription factors, chromatin, and epigenetic modifications in controlling bursting.
  • To explore how distal elements like enhancers influence gene bursting patterns.

Main Methods:

  • Analysis of transcription factor interactions.
  • Investigation of chromatin accessibility and modifications.
  • Examination of epigenetic states and non-histone modifications.
  • Study of enhancer-promoter interactions.

Main Results:

  • Gene bursting is regulated by a complex interplay of transcription factors, chromatin features, and the transcription machinery.
  • Proximal regulation involves epigenetic chromatin states and non-histone modifications.
  • Distal control of bursting patterns is mediated by enhancers.
  • Modulation of bursting kinetic parameters allows for diverse gene-specific expression.

Conclusions:

  • Understanding gene bursting regulation is key to comprehending gene expression variability.
  • Epigenetic factors and enhancer elements play crucial roles in modulating transcription dynamics.
  • Gene bursting provides a mechanism for generating cellular diversity and adaptability.